The process to take power back from Brussels begins today, as the Government sets out its plans to end the dominance of EU law.

A white paper will be published this morning ahead of the Great Repeal Bill, which will try to organise the repatriation of legislation when the UK formally leaves the European Union.

The Bill will do two things: firstly repeal the European Communities Act (1972) which took Britain into the bloc, and also copy up to 20,000 pieces of EU law onto the UK statute book.

Brexit Secretary David Davis said: "Converting EU law into UK law, and ending the supremacy of lawmakers in Brussels, is an important step in giving businesses, workers and consumers the certainty they need.

Image:Donald Tusk is handed a letter signed by the PM, officially triggering Britain's withdrawal from the EU

"And it will mean that as we seek a comprehensive new economic partnership with the EU, our allies will know that we start from a position where we have the same standards and rules."

The devolved assemblies are also worried that the Government will use the Great Repeal Bill as an opportunity to power grab, despite promising to give more powers to the nations.

A Government spokesman also tried to reassure Scotland, Wales and Northern Ireland that their governments would be given "equivalent means to correct EU law that has been implemented at a devolved level".

But the SNP's Stephen Gethins told Sky News that the Government had been "very reluctant" to offer more detail.

He said: "I know there has been all this talk about the Henry VIII clause and the royal prerogative, for a campaign that wanted to bring back control from the European Union they are not giving Parliament much of a say in this process."